/* 先写css样式 */
.header{
/* 设置头部背景 */
background: #f7f7f7;
}
/* 头部包裹区域 */
.header__wrap{
    width: 1200px;
    height: 80px;
    margin: 0 auto;
    position: relative;

}
/* logo区域 */
.header__logo{
    width: 150px;
    height: 38px;
    line-height: 38px;
    font-size: 20px;
    background: url("../img/logo.png") no-repeat left center;
    background-size: 38px 38px;
    position: absolute;
    top: 50%;
    margin-top: -19px;
    padding-left: 58px;
    left: 30px;
}
.header__nav{
    overflow: hidden;
    position: absolute;
    right: 30px;
    top: 50%;
    margin-top: -19px;
    height: 38px;
}
.header__nav-item{
    float:left;
    margin-left: 40px;
    text-align: center;
    color:#292f35;
    font-size: 14px;
    display: block;
    line-height: 38px;
    position: relative;
    width: 30px;
}
.header__nav-item_custom_button{
    width: 90px;
    background: #000;
    color: #f4f4f5;
    border-radius: 3px;
}
.header__nav-tip{
    position:absolute;
    width: 30px;
    margin-left: 40px;
    height: 2px;
    background: red;
    left: 0;
    bottom: 0;

}
.header__nav-item:hover{
    color: #f01400;
}
.header__nav-item_status_active{
    color: #f01400;
}
/* 第一屏 */

.screen-1{
    height: 800px;
    background-color: #e7e7e7;
    position: relative;
    overflow: hidden;
    background: url("../img/bg-screen-1.png") no-repeat center;
    background-size: cover;
}
.screen-1__heading{
    
    font-weight: normal;/* 只是为了用b标签控制部分字体颜色 */
    margin: 0;
    padding: 0;
    font-size: 46px;
    color:#4d555d ;
    text-align: center;
    padding-top: 152px;
}
.screen-1__heading b{
    color: red;
    font-weight: normal;
}
.screen-1__phone{
    width: 1375px;
    height: 305px;
    background: url("../img/screen-1-phone.png") center no-repeat;
    position: absolute;
    left:50%;
    margin-left: -688px;
    bottom: 180px;
    z-index: 2;
    
}
.screen-1__shadow{
    width: 1233px;
    height: 411px;
    background:url("../img/screen-1-shadow.png") center no-repeat;
    position: absolute;
    left: 50%;
    margin-left: -616px;
    bottom: 20px;
    z-index: 1;
    opacity: 0.8;
}
/* screen2 */
.screen-2{
    height:800px ;
    background: #fafafa;
    position: relative;
    overflow: hidden;
}
.screen-2__heading{
    
    font-weight: normal;/* 只是为了用b标签控制部分字体颜色 */
    margin: 0;
    padding: 0;
    font-size: 46px;
    line-height: 46px;
    color:#f01400 ;
    text-align: center;
    padding-top: 96px;
}
.screen-2__subheading{
    font-weight: normal;/* 只是为了用b标签控制部分字体颜色 */
    margin: 0;
    padding: 0;
    font-size: 14px;
    line-height: 28px;
    color:#2c3137 ;
    text-align: center;
    padding-top: 25px;
}
.screen-2__phone{
    width: 928px;
    height: 837px;
    background: url("../img/screen-2-phone.png") no-repeat center ;
    position: absolute;
    left: 50%;
    margin-left: -464px;
    bottom: -345px;
    z-index: 2;
}
.screen-2__point{
    width: 108px;
    padding-right: 112px;
    height: 22px;
    font-size: 22px;
    line-height: 22px;
    color: #4d555d;
    position: absolute;
    background: url("../img/icon-point-right.png") no-repeat center right;
}
.screen-2__point_custom_right{
    padding:0 0 0 112px;
    background: url("../img/icon-point-left.png") no-repeat center left;
}
.screen-2__point_i_1{
    top:150px;
    left: -150px;
}
.screen-2__point_i_2{
    top:30px;
    right: 150px;
}
.screen-2__point_i_3{
    top:330px;
    right:30px;
}
/* screen-3 */
.screen-3{
    height: 800px;
    background: red;
}
.screen-3__wrap{
    width: 1200px;
    height: 800px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}
.screen-3__heading{
    font-weight: normal;/* 只是为了用b标签控制部分字体颜色 */
    font-size: 46px;
    line-height: 46px;
    color:#fff ;
    padding-top: 96px;
}
.screen-3__subheading{
    font-weight: normal;/* 只是为了用b标签控制部分字体颜色 */
    font-size: 14px;
    line-height: 28px;
    color:#fff ;
    padding-top: 25px;
}
.screen-3__phone{
    width: 750px;
    height: 900px;
    background:url("../img/screen-3-phone.png") no-repeat center right;
    position: absolute;
    right: 0;
    top: 150px;
    
}
.screen-3__features{
    width: 320px;
    height: 280px;
    position: absolute;
    left: 0;
    top:395px;
    
}
.screen-3__features__item{
    width: 138px;
    height: 118px;
    float: left;
    border: 1px solid #cb7173;
    border-radius: 3px;
    margin: 0 20px 20px 0;
    text-align: center;
    color: #fff;
}
.screen-3__features__item__number{
    height: 36px;
    line-height: 36px;
    font-size: 36px;
    padding: 28px 0 8px 0;
}
.screen-3__features__item__des{
    font-size: 14px;
    line-height: 14px;
    height: 14px;
}
/* screen-4 */
.screen-4{
    height: 800px;
    background: #fff;
}
.screen-4__wrap{
    width: 1200px;
    height: 800px;
    margin: 0 auto;
    position: relative;
}
.screen-4__heading{
    font-weight: normal;/* 只是为了用b标签控制部分字体颜色 */
    font-size: 46px;
    line-height: 46px;
    color:#f00 ;
    text-align: center;
    padding-top: 96px;
}
.screen-4__subheading{
    font-weight: normal;/* 只是为了用b标签控制部分字体颜色 */
    font-size: 14px;
    line-height: 28px;
    color:black ;
    text-align: center;
    padding-top: 25px;
}
.screen-4__type{
    width: 1260px;
    height:270px ;
    position: absolute;
    top:305px;
   
}
.screen-4__type__item{
    width: 220px;
    margin-right: 90px;
    height: 270px;
    float: left;

    position: relative;
    text-align: center;
    background-size: cover;
}
.screen-4__type__item_i_1{
    background:url("../img/phone-1.png") no-repeat left top;
}
.screen-4__type__item_i_2{
    background:url("../img/phone-2.png") no-repeat left top;
}
.screen-4__type__item_i_3{
    background:url("../img/phone-3.png") no-repeat left top;
}
.screen-4__type__item_i_4{
    background:url("../img/phone-4.png") no-repeat left top;
}
.screen-4__type__item__des{
    text-align: center;
    height: 14px;
    width: 100%;
    line-height: 14px;
    font-size: 14px;
    color:#2c3238;
    position: absolute;
    bottom: -44px;
}
.screen-4__type__item__storage{
    width: 100%;
    height: 12px;
    line-height: 12px;
    font-size: 12px;
    color: #a4a9ae;
    position: absolute;
    bottom: -66px;
}
/* screen-5 */
.screen-5{
    height: 800px;
    background-color: #d9dde1;
    overflow: hidden;
    position: relative;
}
.screen-5__heading{
	font-size:46px;
	line-height: 46px;
	color: #f01400;
	text-align: center;
	padding-top: 130px;
}
.screen-5__subheading{
	font-size:14px;
	color: #2c3137;
	text-align: center;
	padding-top: 25px;
	line-height: 28px;
}
.screen-5__bg{
    width: 1920px;
    height: 433px;
    background: url(../img/bg-screen-5.png)  no-repeat center;
    background-size:contain ;
    position: absolute;
    bottom: -100px;
    left: 50%;
    margin-left: -960px;
    
}
/* screen-buy */
.screen__buy{
    height: 80px;
    padding: 120px 0;
    position: relative;
    background:#2b333b url('../img/bg-screen-buy.png') center no-repeat;
    text-align: center;
}
.screen__buy__button{
    height: 80px;
    width: 240px;
    text-align: center;
    line-height: 80px;
    color:#fff;
    background-color:#f01414 ;
    display: inline-block;
    border-radius: 3px;
    transition: all .5s;
    font-size: 16px;
    font-weight: bold;
    transition: all 0.5s;
}
.screen__buy__button:hover{
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);

}
.footer{
    height: 80px;
    text-align: center;
    line-height: 80px;
    background: #07111b;
    color: #fff;
}
.outline{
    position: fixed;
    padding: 5px 10px;
    bottom: 120px;
    right: 0;
    z-index: 3;
    background-color: #fff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, .5);
}
.outline__item{
    display: block;
    width: 40px;
    height: 30px;
    padding: 5px 0;
    line-height: 30px;
    text-align: center;
    background-color: #fff;
    margin-top: 5px;
    border-top: 1px solid #eee;
    color: #93999f;
}
.outline__item:first-child{
    border: none;
}
.outline__item_status_active{
    color: red;
}
